TypeError: e.$refs.edit is undefined.

- [X] I am on the [latest](https://github.com/ActivityWatch/activitywatch/releases/latest) ActivityWatch version.
- [X] I have searched the issues of this repo and believe that this is not a duplicate.

- **OS name and version**: Debian GNU/Linux 12
- **ActivityWatch version**: v0.13.2

## Describe the bug

## To Reproduce

1. Go to Settings.
2. Make a batch of changes all at once. (I will update this with more details if I can narrow it down more.)
3. Click Save.
4. See error.

## Expected behavior
Save changes without error.

## Documentation

## Additional context
I haven't seen the error when I make single changes to the Categories section. I haven't noticed any functional problems as a result of the bug, but I'm a new user so I may have overlooked something.